Hi. I intend to make a multi fx with 4 circuits in it. I was thinking of using 1 dc jack and a strip of vero from the ground and +9v lugs so that I can power all 4 circuits with it. Will this be ok or will it need 4 separate dc jacks; one for each circuit?
so long as they all use the same voltage (probably 9V), one jack should be enough. Just make sure your supply can supply enough current. it couldn't hurt to include some extra filter caps as well.